High strength paperboard container



c. D. WELSHENBACH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER 1 Filed May 9, 1958 15 Sheets-Sheet 1 igina.

July 6, 1965 NVENTOR Charles .D.Wel.sken1uwh BY W ATTORNEYS July 5, 1965 c. D. WELSHENBACH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9, 1958 15 Sheets-Sheet 2 F1' y. 5F

INVENTOR Charles D. WeLskerf-Zrch ATTORNEYS July 6, 1965 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9, 1958 15 Sheets-Sheet 5 INVENTOR C'karles D. V'elsr-enbach BY/fd/fa/ r ATTORNEYS July 6, 1955 c. D. wx-:LsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER 15 Sheets-Sheet 4 Original Filed May 9, 1958 lllfllltlavllfaf,fill/111111;lllllnll/lanllailfal.

INVENTOR Charles DJVlshenbach ATTORNEYS July 6, 1965 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9. 1958 15 Sheets-Sheet 5 v mysmon Charles DJVeZHenbach MWM QAM ATTORNEYS July 6 1965 c. D. wELsHENBAcl-l 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed lla'y 9. 1958 15 Sheets-Sheet 6 INVENTQRb Charles D. Welskenbach BY l ww ATTORNEYS July 6, 1965 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9. 1958 l5 Sheets-Sheet 7 INVENTOR l Blshenbaok BY V .uw

ATTORNEYS July 6 1965 c. D. wELsHENBAcl-l 3,193,172

HIGH STRENGTH PPERBOARD CONTAINER Original Filed May 9. 1958 l5 Sheets-Sheet 8 INVENTOR Charles D. mkhenbach ATTORNEYS July 6, 1965 c. D. wELsHENBAcH HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9. 1958 15 Sheets-Sheet 9 7 INVENTOR Charles D. Welskenbach BY V 6b ATTORNEYS July 6, 1965 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER 15 Sheets-Sheet 10 Original Filed May 9, 1958 lllllllllllllllllllllllllllllll i lllllllllllllllllllllllllllll l INVENTOR Charles D. We Zshenbach ATTORNEYS July 6, 1955 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9. 1958 15 Sheets-Sheet 11 NVENTOR Charles D. Wels henlzach ATTORNEYS July 5, 1955 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9, 1958 15 Sheets-Sheet 12 Mm..numdnnunmmmmmmmmmmmmmmmmmmwmmmwmq INVENTOR Charles D. Wel/skenbaek July 6, 1965 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9, 1958 15 Sheets-Sheet 1:5

Fi 3E INVENTOR Charles D. Welskenbaek BY v ATTORNEYS July 6 1965 c. D. wELsHENBAcH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9, 1958 15 Sheets-Sheet 14 lNVENTOR Charles D. Welskenback 0 N u 7 E 4 4 F 0 0 0 0 0 0 0 0 :o .-.m. x-m -M .L ahw oo w mi@ M m will! l l l l l l l l l llllllllllllllll llllllllllllll .1| -lili llllll l- 7 8 Iii! 7 21|--- 5 8 9 9 6 .wf M m 9 Y M M M 9 M I .IJ I||||||| I I l I l I l I III IIIIII l I l l I I l I I l I I I I Il M O ca ATTORNEYS July 6, l965 c. D. WELSHENBACH 3,193,172

HIGH STRENGTH PAPERBOARD CONTAINER Original Filed May 9. 1958 15 Sheets-Sheet 15 Fig.

/07 INVENTOR /09 C'karlesDJl/'elshenbach BY v @Ax/HM ATTORNEYS United States Patent Gilice 3,1%,l72 Patented July 6, 1965 3 193,172 HIGH STRENGTH PPERBOARD CNTAINER Charles D. Welshenhacil, Sandusky, Ohio, assigner to West Virginia Pulp & Paper Company, New York, N.Y., a corporation of Delaware Original application May 9, 1958, Ser. No. 734,230, now Patent No. 3,118,587, dated Jan. 21, 1964. Divided and this application Sept. 23, 1963, Ser. No. 318,138

1 Claim. (Cl. 229-23) This invention relates to paperboard containers and more particularly to containers or cartons that have strength and rigidity enough to make them suitable for use as shipping and storing containers for shipping and storing loose heavy articles such as nails, bolts, nuts, screws or thev like, or for shipping other materials. This application is a divisional application with respect to copending application Serial No. 734,230, led May 9, 1958.

The present invention may comprise an inner box and cover box of identical construction except that the cover box is made slightly larger than the inner box so that its internal dimensions correspond to the external dimensions of the inner box to permit it to telescopically receive the inner box.

The inner box and cover box may be formed from a substantially rectangular web section, and yeach has an end wall strongly united to the upright side walls, two adjacent side walls being single ply walls and the other two adjacent side walls being double ply Walls.

The inner box and cover box may be so shaped that they can be intertted only when the double ply walls of the cover box are contiguous to the single ply walls of the inner box and the single ply walls of the cover box are contiguous to the double ply walls of the inner box.

Containers having some of the above features have been previously provided. However the present invention relates to box structure wherein these features are provided in a manner which enables the cover box and inner box to be shipped in a collapsed condition to thereafter be erected by the user without the necessity of the user employing any stapling or gluing or other equivalent fastening means whatsoever. Previously provided containers having some of the features mentioned above are extremely durable and lend themselves well to uses where high strengths are required, but they cannot be shipped in a collapsed position and then used without the user employing stapling or gluing or other fastening operations in erecting the container.

It is entirely conceivable that in some circumstances and for some applications the user of containers contemplated by the present invention may not wish to have the containers pre-stapled, pre-glued or pre-fastened by the manufacturer. Even aside from the feature of being erectable from its collapsed position without fastening operations, the invention represents a significant contribution to the iield of packaging due to its economy, its high stack strength which compares with the best containers of the prior art, and its usefulness in many packaging applications.

In another signiiicant aspect, the invention contemplates containers which do not comprise a composite container consisting of a cover box and an inner box but which comprise a single box of the same or similar structure as each of the parts of the composite container. Such single box is provided with end flaps and may be preferably additionally pnovided with a liner. Such type of container has been found to lend itself very well to packaging of relatively small amounts of loose heavy materials such as nails or other matter.

Other objects, uses and advantages will become apparent from the following description.

In the drawings:

FIGURE 1 is a perspective view of a container embodying the invention.

FIGURE 2 is a cross-sectional view on a slightly enlarged scale of the container shown in FIGURE 1.

FIGURE 3 is a horizontal cross-section taken on line 3 3 in FIGURE 2.

FIGURE 4 is a vertical cross-section taken on line 44 in FIGURE 2.

FIGURE 5 illustrates yin six perspective views designated A-F the erection from collapsed position of the cover box of the container shown in FIGURES 1-4.

FIGURE 6 illustrates a pair of blanks from which the cover box and inner box of the container shown in FIG- URES 1-4 may be formed, the blanks being viewed from what is to become their inner sides.

FIGURE 7 illustrates a pair of blanks from which slightly variant embodiments of the invention may be formed, the blanks being viewed from what is to become their inner sides.

FIGURE 8 is a Vertical cross-section of a container made from the blanks of FIGURE 7 and embodying the invention.

FIGURE 9 is a vertical cross-section taken on line 9-9 in FIGURE 8.

FIGURE 10 is a horizontal cross-section taken on line 10-10 in FIGURE 8.

FIGURE 1l is a perspective view of another container embodying the invention.

FIGURE 12 is a cross-sectional view on a slight enlarged scale of the container shown in FIGURE 11.

FIGURE 13 is a horizontal cross-section taken on line 1313 in FIGURE l2.

FIGURE 14 is a vertical cross-section taken on line 14-14 in FIGURE l2.

FIGURE 15 illustrates in eight perspective views designated A-H the erection of the container shown in FIG- URES 1l-14.

FIGURE 16 illustrates a pair of blanks from each of which, together with a liner, the box of the container shown in FIGURES 11-14 may be formed, the blanks being viewed from what is to become their inner sides.

FIGURE 17 illustrates a pair of blanks from which slightly variant embodiments 'of the invention may be formed, the blanks being viewed from what is to become their inner sides.

FIGURE 18 is a vertical cross-section of a container made from one of the blanks of FIGURE 17 together with a liner.

FIGURE 19 is a vertical cross-section taken on line 19-19 in FIGURE 18.

FIGURE 2O is a horizontal cross-section taken on lin 2li-20 in FIGURE 18.

FIGURE 21 is a vertical cross-section of another container made from the other of the blanks of FIGURE 17 together with a liner.

FIGURE 22 is a vertical cross-section taken on line 22-22 in FIGURE 21.

FIGURE 23 is a horizontal cross-section taken on line 23-23 in FIGURE 21.

FIGURE 24 is a view of a supplemental liner such as that shown in FIGURES 18-20 and 21-23.

FIGURE 25 is a View of another supplemental liner which may be employed according to the invention.

FIGURE 26 is a perspective view showing a container embodying a very promising variant of the invention.

FIGURE 27 is a cross-sectional View on a slightly enlarged scale of the container shown in FIGURE 26.

FIGURE 28 is a horizontal cross-section taken on line 28-28 in FIGURE 27.

FIGURE 29 is a vertical cross-section taken on line 29-29 in FIGURE 27.

FIGURE 30 illustrates a pair of blanks from which the cover box and inner box of the container shown 1n FIG- .f

URES 26-29 may be formed, the blanks being viewed from what is to become their inner sides. FIGURE 31 illustrates a'pair of blanks from which slightly variant embodiments of the invention may beA formed, the blanks being viewed from what is to become` their inner sides.

FIGURE 32 is a vertical cross-sectionof' a container made from the blanks of FIGURE 31 and embodying the invention.

FIGURE 33 is a horizontal cross-section taken on line 33-33 in FIGURE 32.

FIGURE 34 is a vertical cross-section taken on line 34-34 in FIGURE 32. Y

FIGURE35 is a cross-sectional view of another container embodying the invention.

FIGURE'36 is a horizontal cross-section taken on line 36-36 in FIGURE 35.

FIGURE 37 is a vertical cross-section taken on line 37-37 in FIGURE 35;' 'l

FIGURE 38 illustrates a painofblanks from each of which, together with a liner, the box of fthe container shown in FIGURES 35-37 may be formed, the. blanks being viewed from what is to become their Iinner` sides.Y

FIGURE 39 illustrates a pair of blanks from'which slightly variant embodiments of the invention may be formed, the-blanks being viewed from what" is to become Y their: innerI sidesl A a FIGURE 40 is a vertical crosssection of a container made from one of theblanks of FIGURE 39 together with a liner. FIGURE 4l is a' horizontal cross-sectiontakenon 'line 41-1-41 in FIGURE 40. v n FIGURE 42 is a Vertical cross-section taken on line 42--42 in FIGURE 40. Y Y

FIGURE 43 is a vertical cross-section of another container made from the other of the blanks of FIGURE 39 together with a liner. Y

FIGURE 44 is a horizontall cross-section taken on line 44-44 in FIGURE 43.

VFIGURE 45 is a vertical cross-section taken on line 45--45 in FIGURE 43. Y Y

FIGURE 46 isa view of a supplemental liner such as that'shown in FIGURES 40-42 and i3-'45.

' FIGURE 47 is a view of Yanother supplemental liner which may be employed according to the invention.

Referring'to FIGURES 1-6 of the accompanying drawings, the illustrated container may comprise an inner box or unit and a cover box or unit, the two boxes or units being preferablyof equivalent construction except for the slight differences in dimensionsnecessary to permit the cover box to t closely over `the inner box'.,`

In order to distinguish the parts off the inner boxfrom the parts of the cover box where the two are in assembled relation while at the Vsame time showing the similarity between the two boxes, theparts of the inner box are'des'ignated with the same reference numerals'as the corresponding parts of the cover box with the addition of the reference character 11. I

The cover box or unit of the present invention is preferably vertically elongated and has adjacent, upright, single ply walls 1 (not seen in FIGURE V1) and 2. The other walls of the box are double ply walls having outer plies Sand 4 and inner plies 5 and 6, respectively. Y Single plies (1 and 4') of two adjacent side walls (l and 4, V6) are hinged to and integral with each other and also each is hinged to and integral Vwith another ply Y(2` and Srespectively). of another of the side walls (2 :and 3, 5 respectively). The sidel wallsr will therefore be seen t0 comprisefour rectangularly disposed Vwalls'with a pair of the side walls being double ply,- the remaining pair of the side walls being single ply, and each member ofreach of such pairs being adjacent to theY other member` of its pair.

vply side wall 3, .5 and also is hinged to and integral with the single ply side wall 1. The ply Sis hinged to and integral with the inner ply of the double ply side wall 4, 6 and kalso is hinged to and integral with the single ply side wall 2.

Inrthe particular structure illustrated, the plies 2 and 3 are joined by a seam or Hap 9 which is integral with the ply 2 and is suitably fastened to the ply 3 by stapling, as shown, or by gluing or other suitable means. 1

The cover box maybe provided with handles (not shown) if desired. An appropriate type of handle structure is shown in U.S Patent No. 2,761,610...

The innervbox or unit of the present invention is preferably vertically elongated and has adjacent, upright,

Ysingle, ply side walls 1a and 2a. The other walls of the and each member of each of such pairs being` adjacent to the other member of its pair.

, The end wall of the inner box orunit comprises an inner ply 7a and an outer ply 8a. Each of the plies 7a and 8a is hinged to and integral with one lply of each of a twosome of opposite side walls. Thus, thel ply 7a is hinged-to and integral with the inner ply 5a of the double ply side wall 3a, 5a andV also is hinged to and integral with the single ply side wall 1a. The ply 8a ishinged to and integral with the inner ply 6u of thel doubler ply side wall 4a, 6a and also is hinged to and integral with Vthe single ply side wa1l'2a. Y t

The plies 2a and v3a`are joined by a seam or ap 9a ywhich is integral with the ply 2a and is suitably fastened Vto the ply, 3a by stapling or by gluing or. by other suitable means.v l y' f When the cover boxVv or unit and the inner box or unit are telescoped together with theirl closed ends at opposite ends of the resulting container, the double ply side walls of` each box are positioned against the single ply side walls of the other box to provide a container having four triple ply side walls and twoV double ply end walls. p

The width of the plies 7, 8,A 7a and 8a between their boundingV hinge lines is such as to cause the plies 5, 6, 5a and 6a, respectively, in the, erected condition of the structure, vto be positioned immediately and snugly adjacent theV inner sides of the plies 3, 4, 3a and 4a, respectively. Thetransverse width ofthe plies 5, 6, 5a and 6a is preferably such as to cause the side edges of these plies to snugly'engage the plies or walls against which these edges abut in theerected condition of the carton. f

The cove'rvboxY may be shipped in the collapsed condition shownNin FIGURE 5A. It is erected by the end user without any fastening operations by following the sequence of `steps shown 'in FIGURES 5B to 5F.. The box maybe shipped in a different collapsed state by extending the :two long flaps, one of whichgconsists' of the members 5 `and 7 andqtheiother ofwhich consists of the members 6 and 8, from the opposite or rear end of the box, as itis seen in FIGURE 5.` However the box is less conveniently erected from this latter collapsed condition. The inner box may also be shipped in either of the above collapsed conditions. f Inanyevent, the arrangement is such that the inner ply 5 or 6 or 5a or 6a of double ply side wall of the cover box and inner box may with its associated end wall ply be collapsed inwardly when the box is empty and separated from its partner box. However this may not be done when the cover box and inner box are telescoped together. In use, there will rarely be occasion to so collapse the structure, but the structural features which render the structure so collapsible also render it readily erectable without fastening operations, and this latter feature is of significance, as earlier explained.

It should be clear that for the cover box or unit shown in FIGURES 1-5, and similarly for the inner box or unit, the plies 14% or 1li-4a constitute four adjacent rectilinear tube-.forming panels, the two laterally extreme panels of the four (2 and 3 or 2a and 3a) being seamed to each other by the ap 9 or 9a to provide a tube comprising the four panels. The plies 7 and 8 or 7a and 8a constitute two end-wall-forrning panels each hinged at a first edge to its own one of an adjacent pair (1, 2 or 1a, 2a) of the four tube panels 1-4 or 1a-4a. The plies 5 and 6 or 5a and 6a constitute liner panels yfor forming the inner plies of two walls of the container unit which two walls outer plies will comprise the tube panels 3, 4 or 3a, 4a. Each of the two endwall-forrning panels 7 and 8 or 7a and Sa is hinged at a second edge opposite to its above-mentioned first edge to one of the liner panels 5 and 6 or 5a and 6a. The width of each of the end-wall-forming panels between its above-mentioned first and second edges is sufficient to allow the hinged edge of its associated liner panels 5 and 6 or 5a and 6a to snugly engage the inner side of the tube at an end thereof when the tube is erected, but such width is insufficient to allow the last-mentioned hinged edge to extend over the end of the tube.

The blanks shown in FIGURE 7 may also be made `rup into boxes or units embodying some or all aspects of the invention. The outer or cover box bla-nk includes the plies or panels 11-15 and the flap 19. The inner box includes the plies or panels 11a-18a and the flap 19a. The blanks are made up into boxes by fastening the tabs 19 and 19a to the panels 13 and 12a, respectively, and folding the blanks as indicated. The boxes are assembled into a container having triple ply side walls and double ply end walls. A first side wa-ll may comprise the plies 12, 13a, 15a, the plies being stated in the order of their disposition from outer to inner locations in the structure. A second adjacent side wall may comprise the plies 13, 12a, 16a. A third side wall adjacent to the second and opposite the fir-st may comprise the plies 14, 15, 11a. The fourth side wall may comprise the plies 11, 16, 14a. The upper end wall Icomprises the outer ply 17 and the inner ply 18. The lower end wall comprises the outer ply 18a and the inner ply 17a.

The cover box or cover unit in this resulting container is vertically elongated and has adjacent, upright, single ply walls 12 and 13. The other walls of the box are adjacent, double ply walls having outer plies 11 and 14 and inner plies 16 and 15, respectively. The plies 11 and 14 are hinged to and integral with each yother and also each is hinged to and integral with another ply (12 and 13 respectively) of another of the side Walls (the single ply walls 12 and 13, respectively). The side wal-ls will therefore be seen to comprise four rectilinearly disposed walls with a pair of the side walls being double ply, the remaining pair of the side walls being single ply, and each member of each of such pairs being adjacent to the other member of its pai-r.

The end wall of the cover box, made up from the l panels 11-18, comprises an outer ply 17 and an inner ply side wall 12. The ply 18 is hinged to and integral with the inner ply 16 of the double ply side wall 11, 16 and also is hinged to and integral with the single ply side wall 13.

The inner box or unit made up from the panels 11a-18a is vertically elongated and has adjacent, upright, single ply walls 11a and 14a. The other walls of this box are adjacent, double ply walls having outer plies 12a and 13a and inner plies 16a and 15u, respectively. The plies 11a and 14a are hinged to and integral with each other and also each is hinged to and integral with another ply (12a and 13a respectively) of another of the side walls (12a, 16a and 13a, 15a respectively). The side walls will therefore be seen to comprise four rectilinearly disposed walls with a pair of the side walls being dou-ble ply, the remaining pair of the side walls being single ply, and each member of cach of such pairs being adjacent to the other member of its pair.

The end wall of the inner box or unit made up from the panels 11a-18a comprises an inner ply 17a and an outer ply 18u. Each of the plies 17a and 18a is hinged to and integral with one ply on eac-h of a twosome of opposite side walls. Thus, the ply 17a is hinged to and integral with the inner ply 15a of the double ply side wall 13a, 15a and also is hinged to and integral with the single ply side wall 11a. The 4ply 18a is hinged to and integral with the inner -ply 16a of the double ply side wall 12a, 16a and also is hinged to and integral with the single ply side wall Ma.

The width or" the plies 117, 18, 17a and 18a between their bounding hinge lines is such as to cause the plies 15, 16, 15a and 16a respectively, in the erected condition of the structure, to be positioned immediately and snugly adjacent the inner sides of the plies 14, 11, 13a and 12a respectively. `The transverse width of the plies 15, 16, 15a and 16a is preferably such as to cause the side edges of these plies to snugly engage the plies or walls against which these edges abut, in the erected condition of the carton.

The cover box or unit 11-18 and the inner box or unit 11a-18av may be collapsed, shipped and erected in the ways previously described in connection with the boxes 1 8 and lll-Sa.

Referring to FIGURES ll-l6 of the accompanying drawings, the container there illustrated is not a composite container consisting of an inner box and an outer box, but rather comprises only one box, which is adapted to be combined with a suitable liner.

Since in connection with the container shown in FIGURES 11-l6 there is no cover box or inner box, as such, the reference character a is not used in connection with these figures to show correspondence of parts, as was done in connection with FIGURES 110.

The box shown in FIGURES 11-16 is preferably squat rather than elongated. It has adjacent, upright, single ply side walls 21 and 22. The other walls of the box are double ply, having outer plies 23 and 24 and inner plies 25 and 26, respectively. Single plies 21 and 24 of two adjacent side walls (21 and 24, 26 respectively) are hinged to and integral with each other and also each is hinged to and integral with another ply (22 and 23 respectively) of another of the side walls (22 and 23, 25 respectively). The side walls will therefore be seen to comprise four rectilinearly disposed walls with a pair of the side walls being double ply walls and the remaining pair of the side walls being single ply walls, and each member of each of such pairs being adjacent to the other member of its pair.

An end wall of the article comprises an inner ply 27 and an outer ply 28. Each of the plies 27 and 28 is hinged to and integral with one ply of each of a twosome of opposite side walls. Thus, the ply 27 is hinged to and integral with the inner ply 25 of the double ply side wall 23, 25 and also is hinged to and integral with the` single ply si-de wall 21. The'ply y28 is hinged tov and integral with t-he inner ply 26 of the double ply side wall 24, 26 and also is hinged to and integral withY which is integral with the ply-22 and is suitably fastened to the ply 23 by stapling or by gluing or by other suitable means. o

yThe container unit thus far described is preferably augmentedby a supplemental liner, such as the supplemental liner `5,0 shown inFIGURE 24 or the supplemental liner 51 shown in FIGURE 25. In FIGURES 12-15, the article is shown provided with the supplemental liner 50. `The use of the, supplemental liner t)V provides a total of three -plies of paperboard on each sideof the assembled article. The use of the supplemental liner.51 provides a total of two plies of paperboard on each sideof the assembled article. Itwill be seen that whichever supplemental liner is used, the number of plies of the supplemental liner at the single ply side walls formed by the plies orpanels 21 and 22 exceeds by'one the number of plies of the supplemental liner at the double `ply side walls 23, 25 and.24, 26.

The width of the plies27 and 28 between their bounding hinge lines is such as tocause the plies25 and 26, respectively, in the erected condition of the structure, to be positioned immediately and snugly adjacent the inner sides of the plies 23 Vand 24, respectively. The transverse width of the plies 25 and 26 is preferably such as to cause the side edges of these plies to snugly engage the plies or Walls against lwhich these edges abut in the erected condition of the carton. v

The article maybe shipped in the collapsed position shown in FIGURE A. It may be erected by the end l user by following the sequence of steps shown in FIG- URES 15B to 15H, except that the end flaps 20 need not be folded outwardly as shown in FIGURES 15B to 15H. They are so shown in the drawings to enable the other parts to be more clearly seen.V The-article may be shipped in a different collapsed state kby extending Vthe two long aps, one offwhich consists of the members Z5 and 27 and the other of which consists of the members 26 and 28, from the opposite or rear end of' the article, as it is seen in V"FIGURE-:15.- However, the article is'less conveniently erected from this latter col- .lapsedcondition In any event, the arrangement `is such that the inner ply, or 26 of each double ply side wall of the article may, with its associated end wall-ply, be

collapsed inwardly when the article is empty and the' end aps 2) are open. However', this may not be done when the end flaps 20 Vare closed. In use, there will rarely be occasion to collapse the structure, butl the structural features which render the structure so collapsible also Yrender it readily erectable, and this latter feature is of forming the inner plies of twol wallsfof the unlined ar- Y ticle which two walllsrouter plies will Vcomprise-the'tube panels 23 and 24. Each of the two endwall-forming panels 27 and 28 is hinged-at a second edge opposite to its above-mentioned first edgeto one of the liner panels 25 and 26; The width of` each :of the end-wall-forming panels between itsabove-rnentioned first and second edges is sucient tol allow the hinged edge vof its associated liner panels 25 and 26 to snugly engagethe inner side `of the tube at an end thereof lwhen the tube is erected,

but such widthis insuicient to allow the last-mentioned hinged edgeY to extend over the end of the tube.

The blank shown in the left hand portion in FIGURE 17 may also be made up into an articleembodying Asome or all aspects yof the invention.l Acontaineremploying this article. is shown in FIGURES 18-20.

and innerr plies 36 and 35 respectively. Single plies 31 and 34 of two adjacent sidewalls (31 and 34) are hinged to and integraluwith each other and also each is hinged to'and integral with another ply (32 and 33 respectively) Yof another of the Side walls (32, 35 and 33, 35 respectively).V The` side walls are therefore seen to comprise four rectilinearly disposed walls with a pairY ofthe s1de vwalls being doubleply walls and the remaining pair of the sidewalls being singleply walls, andeach member 'of each of such pairs being adjacent to thel other member of .its pair.k

An end wall of the article Ycomprises an inner ply'37 land an outer ply 33.k Each of lthel plies 37 and 3S'is hinged to andintegral with one rply of each of a twosome of opposite side walls. Ths, theVV ply 37 is hinged to andY integral withthe inner ply 35 of the double ply side wall 33, 35 and. also. is hinged Vto and integral with the single ply side wall 31.l The ply`38 is hinged to and integral with the innerply 36 of the double ply side wall 32,36 and also is hinged to and integral kwith the single ply side wall 34. f

At the other end ofthe article, flaps 30 are integrally hinged tothe plies or panels 31-34. The flaps 30 are glued or otherwisesuitably adhered or fastened to form an end wall'opposite to that formedby the plies or panels 37 and 38. These aps 30 must be unfastened to con- Veniently collapse fthe box. i

The plies v32 and 33 are joined by a seam o r ap 39 which is integral with the vply 33 .and is suitably fastened to the ply 32 by stapling or by gluing or by other suitable means.

The container unit thus far described .is r preferably augmented by a supplemental liner, such as the supplemental linerf50 shownr in FIGURE v24V or the Supplemental liner-y 51 shown iny FIGURE 25. In FIGURES 18e20, the article is shown provided withthe supplemental liner 50. 'It' will be seen vthat whichever supplemental liner is used, the number of plies of the supplemental liner at the singlel ply side Walls 31 and `34 exceedsby one of the number of plies ofthe supplemental liner at thedouble ply side walls 32, 36 and 33,35.

The width of the plies 37 and 38 between their bounding hinge lines is-such as to cause the plies 35 Vand 36,

respectively,'in the erected condition of the. structure, to be positioned immediately and snugly adjacent the inner-sides of the plies 33 and 32 respectively.` The ytransverse `width of the plies'35and36 is preferably such as to cause theY side edges vof `these plies to snugly engage the plies or walls against which these edges abut inthe erected conditionof the carton.v f l Y vIt should be clear that for the article shown in FIG- URES 18-20, the plies 31-34 constitute -four Vadjacent rectilinear tube-forming panels, the two laterally extreme panels of the four (32 and 35) being seamed to yeach other by the flap '39. to provide a tube comprisingthe four panels.. The plies 37'and v38 constitute twov endwall-forming panels,each hin ged iat a tlrst edge to its own one of'an adjacentppair (Bilanci 3 4) o f thefour tube panels 31-34. The plies 35 and 36 constitute liner panels yfor forming the inner plies of two walls of the unlined article which two walls outer plies will comprise the tube panels 33 and 32. Each of the two end-wallforming panels 37 and 3S is hinged at a second edge opposite to its above-mentioned iirst edge to one of the liner panels 35 and 36.

The box shown in FIGURES lS-ZO may be collapsed, shipped and erected in the ways previously described in connection with the box illustrated in FIGURES l1-l6.

The blank shown in the right hand portion of FIG- URE 17 may also be made up into an article embodying some or all of the aspects of the invention, A container employing this article is shown in FIGURES 2l-23.

Withreference to these figures, the illustrated container again comprises only one box which is adapted to be combined with a suitable supplemental liner rather than consisting of an inner box and an outer box.

The box shown in FIGURES 2l23 has adjacent, upright, single ply side walls 42 and 43. The other walls of the box are double ply, having outer plies 41 and 44 l and inner plies 46 and 45 respectively. Single plies 4I and 44 of two adjacent side walls (41, 46 and 44, 45) are hinged to and integral with each other and also each is hinged to and integral with another ply (42 and 43 respectively) of another `of the side walls (42 and 43 respectively). The side walls will therefore be seen to constitute four rectilinearly disposed walls with a pair of the side walls being double ply walls and the remaining pair of the side walls being single ply walls and each member of each of such pairs being adjacent to the other member of its pair.

An end wall of the article comprises an inner ply 48 andan outer ply 4'?. Each of the plies 4S and 47 is hinged to and integral with one ply of each of a twosorne of opposite side walls. Thus, the ply 48 is hinged to and integral with the inner ply 46 of the double ply side wall 41, 46 and also is hinged to and integral with the single ply side wall 43. The ply 47 is hinged to and integral with the inner ply 45 of the double ply side wall 44, 45 yand yalso is hinged to and integral with the single ply side wall 42.

At the other end of the article, flaps 4@ are integrally yhinged to the plies or panels 411-44. The flaps 40 are glued or otherwise suitably adhered or fastened to form an end wall opposite to that formed by the plies or panels 47 and 4S. These flaps 40 must be unfastened to conveniently collapse the box.

The plies 42 and 43 are joined by a seam or flap 49 which is integral with the ply 43 and is suitably fastened to the ply 42 by stapling or by gluing or by other suitable means.

Again, they container unit thus far described in connection with FIGURES 21-23 is preferably augmented by a supplemental liner such as the supplemental liner 50 shown in FIGURE 24 or the supplemental liner 51 shown in FIGURE 25. In FIGURES 21-23 the article is shown provided with the supplemental liner 50. It will be seen kthat whichever supplemental liner is used, the number of yplies of the supplemental liner at the single ply side walls 42 and 43 exceeds by one the number of plies of the supplemental liner at the double ply side walls 41, 46 and 44, 45.

Again, the width of the plies 47 and 4S between their kbounding hinge lines is such as to cause the plies 45 and y46, respectively, in the erected condition of the structure,

to be positioned immediately and snugly adjacent the inner sides of the plies 44 and 41, respectively, and the ytransverse width of the plies 4S and 46 is preferably such as to cause the side edges of these plies to snugly engage the plies or walls against which these edges abut in the erected condition of the structure.

It should be clear that for the article shown in FIG- URES 21-23, the plies 41-44 constitute four adjacent rectilinear tube-forming panels, the two laterally extreme l@ panels of the four (42 and 43) being seamed to each other by the ap 49 to provide a tube comprising the four panels. The plies 47 and 48 constitute two end-wallforming panels, each hinged at a first edge to its own one of an adjacent pair (42 and 43) of the four tube panels 41-44. The plies 45 and 46 constitute liner panels for forming the inner plies of two walls of the unlined article whilch two wallsouter plies will comprise the tube panels 44 and 41. Each of the two end-wall-forming panels 47 and 48 is hinged at a Second edge opposite to its abovementioned first edge to one of the liner panels 45 and 46.

The box shown in FIGURES .2l-23 may be collapsed, shipped and erected in the ways previously described in connection with the box illustrated in FIGURES 11-16.

The structure shown in FIGURES 26-3() comprises an inner box or unit and a cover box or unit, the two boxes or units being preferably of similar construction except for the slight diierences in dimensions necessary to permit the cover box to iit closely over the inner box.

Again as before, in order to distinguish the parts' of the inner box from the parts of the cover box where the two are in assembled relation while at the same time showing the similarity between the two boxes, the parts of the inner box are designated with the same reference numerals as the corresponding parts of the cover box, with the addition of the reference character a.

The cover box or unit which is shown has adjacent, upright, single ply walis 61 (not seen in FIGURE 26) and 62. The other walls of the box are double ply walls having inner plies 63 and 64 and outer plies 65 and 66, respectively. Single plies (61 and 64) of two adjacent side walls (61 and 64, 66) are hinged to and integral with each other and also each is hinged to and integral with another ply (62 and 63 respectively) of another of the side walls (62 and 63, 65 respectively). The side walls will therefore be seen to comprise four rectangularly disposed walls with a pair of the side walls being double ply, the remaining pair of the side walls being single ply, and each member of each such pairs being adjacent to the other member of its pair.

The end wall of the cover box or unit comprises an inner ply 67 and an outer ply 68. Each of the plies 67 and 68 is hinged to and integral with one ply of each of a twosome of opposite side walls. Thus, the ply 67 is hinged to and integral with the outer ply of the double ply side wall 63, 65 and also is hinged to and integral with the single ply side wall 6l. The ply 68 is hinged to and integral with the outer ply 66 of the double ply side wall 64, 66 and also is hinged to and integral with the single ply side wall 62.

In the particular structure illustrated, the plies 62 and 63 are joined by a seam or flap which is integral with the ply 62 and is suitably fastened to the ply 63 by stapling, or by gluing or other suitable means. The plies 65 and 66 are affixed to the plies 63 and 64, respectively, as by gluing or other suitable means.

The inner box or unit which is shown has adjacent, upright, single ply side walls 61a and 62a. The other walls of the box are double ply, having inner plies 63a and 64a and outer plies 65a and 66a, respectively. Single plies 61a and 64a of two adjacent side walls (61a and 64a, 66a respectively) are hinged to and integral with each other and also each is Ahinged to and integral with another ply (62a and 63a respectively) of another of the side Walls (62a and 63a, 65a respectively). The side walls will therefore be seen to comprise four rectangularly disposed walls with a pair of the side walls being double ply walls and the remaining pair of the side walls being single ply walls, and each member of each such pairs being adjacent to the other member of its pair.

The end wall of the inner box or unit comprises an inner ply 67a and an outer ply 68a. Each of the plies 67a and 68a is hinged to and integral with one ply of each of a twosome of opposite side walls. Thus, the ply 67a is hinged to and integral with the outer ply 65a of 

